One-way deficit of two-qubit
$$X$$
X
states

One-way deficit of two-qubit
$$X$$
X
states
Wang, Yao-Kun; Jing, Naihuan; Fei, Shao-Ming; Wang, Zhi-Xi; Cao, Jun-Peng; Fan, Heng
2015-05-01 00:00:00
Quantum deficit originates in questions regarding work extraction from quantum systems coupled to a heat bath (Oppenheim et al. in Phys Rev Lett 89:180402, 2002). It links quantum correlations with quantum thermodynamics and provides a new standpoint for understanding quantum non-locality. In this paper, we propose a new method to evaluate the one-way deficit for a class of two-qubit states. The dynamic behavior of the one-way deficit under decoherence channel is investigated, and it is shown that the one-way deficit of the
$$X$$
X
states with five parameters is more robust against decoherence than entanglement.
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Abstract

Quantum deficit originates in questions regarding work extraction from quantum systems coupled to a heat bath (Oppenheim et al. in Phys Rev Lett 89:180402, 2002). It links quantum correlations with quantum thermodynamics and provides a new standpoint for understanding quantum non-locality. In this paper, we propose a new method to evaluate the one-way deficit for a class of two-qubit states. The dynamic behavior of the one-way deficit under decoherence channel is investigated, and it is shown that the one-way deficit of the
$$X$$
X
states with five parameters is more robust against decoherence than entanglement.